Should a 12-year-old wear strapless?

I shopped with my 12-year-old this weekend for a dress to wear to the crew banquet next month. She picked out a short strapless dress — a black bodice with a poofy white net skirt with polka dots on it — by Jessica McClintock. And she really, really, really wanted it. She’ll wear a cardigan over it, but still. Here’s a photo of the dress — and my daughter doesn’t look at all like this model because my daughter looks, well, 12.